Phonograph-reproducer.



No. 884,062. PATENTED APR. '7, 1908.

H. BALDWIN.

PHONOGRAPH RBPRODUGER- APPLICATION FILED p20. a. 1907.

\IllIlllllllllllllllllllllll iweru zn' affordin the need e or sty HIRAM BALDWIN, OF CHICAGO, ILLINOIS.

PHONOGRAPH-REPRODUCER.

Specification of Letters Patent.

. Patented April 7, 1908. 1

Application filed December 6, 1907. Serial No. 405,312.

To all whom it may concern.

Be it known that "I, HIRAMBA'LDWIN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illi-.

1101s, have invented a new and useful Improvement in.Phonograph-Reproducers, of

which the following is "a specification.

The object of my invention is to providea novel needle or stylus as the sound-reproducer of a phonograph or analogous instrument, which shall possess, as attributes, toneimproving qualities in the way of softness and freedom from noise from its contact with the record, andgood sound-conductivity.

I have discovered that ivory isa substance v 1n 9. high degree these attributes in us of a phonograph; and my invention, based on this discovery, consists in a reproducer needle composed, as to its entirety or atleast as to its attenuated portion, of ivory.

In the accompanying drawing, Figure 1 is a broken view showing a reproducer-head equipped with my improved needle applied to the ordinary disk-record of a phonograph; and Figs. 2, 3 and 4 areperspective views representing three of the various forms in which my improved needle may be provided.

The numeral 5 represents a reproducerhead of ordinary construction, involving a holder 6 for adjustably supporting a stylus 7 in operative position relative to a rotary disk-record 8. The stylus or needle consists of a stem-portion 9 and an attenuated portion 10 formed, preferably in its entirety, of ivory, in suitable shape, including the shapes represented; though it is within my invention .to form only the attenuated portion of ivory. Furthermore I findit to be advantageous, as enhancing the attributes hereinbefore specified, to artificially harden the ivory of'the stylus, particularly as to its at-. tenuated portion, and this I have done by immersing it, for a brief period'say of an hour, more or lessin a saturated solution of chromic acid, though chromate of potash will serve the purpose, and thereupon drying.

the ivory.

What I claim as new and desire to secure by Letters Patent is:

a reproducer-hcad, of a needle having its attenuated record-engaging portion composed of ivory.

2. The combination in a phonograph, with a reproducer-head, of a needle having its attenuated record-engaging portion composed,

of artificially-hardened ivory.

3. The combination in a phonograph, with a reproducer-head, of a needle consisting of a stem-portion at which it is supported on said head, and an attenuated record-engaging portion, said needlebeing composed in its entirety of ivory.

4. The combination in a phonograph, with a reproducer-head, of a needle consisting of a stem-portion at which it is supported on said head, and an attenuated record-engaging portion, said'needle being composed in its:

entirety of artificially-hardened ivor HIRAM BALD IN; In presence of-:

W. T. JoNEs, RALPH SCHAEFER.

1. The combinatlon 1n a phonograph, with i 

